Epimedium perralderianum (Barrenwort):
Tiny lemon yellow flowers held on fine wires above attractive, marbled foliage. Very good in shade, even dry shade
Euphorbia myrsinites (Spurge):
Sprawling stems of glaucous leaves and acid green flowers in spring. Prefers full sun and good drainage. Hardy. Up to 30cm.
Mukdenia rossii:
Short plump spikes of white flowers in spring, but mainly grown for its foliage which turns brilliant red in autumn. Up to 30cm.
Tiarella cordifolia (Foam flower):
Spikes of tiny white flowers in spring/early summer. Rounded, attractive fresh semi-evergreen foliage, bronze in autumn. Up to 30cm. Hardy.